db> tr
kdb_enter(c07a0ebc,1,c07a02fb,d54685f4,c19f2320) at kdb_enter+0x30
panic(c07a02fb,c0913c83,c0913d70,3ac,c09157c0) at panic+0x14e
_mtx_lock_sleep(c09157c0,c19f2320,0,c0913d70,3ac) at _mtx_lock_sleep+0x44
_mtx_lock_flags(c09157c0,0,c0913d70,3ac,0) at _mtx_lock_flags+0xc0
bdg_forward(c1d86800,c1a7b000,c07b7acb,d54686f0,c05cce86) at bdg_forward+0xb0
ether_output_frame(c1a7b000,c1d86800,6,d546885c,d5468708) at ether_output_frame+
0x99
ether_output(c1a7b000,c1d86800,d546885c,0,0) at ether_output+0x43e
nd6_output(c1a7b000,c1a7b000,c1d86800,d546885c,0) at nd6_output+0x3c1
ip6_output(c1d86800,c0840b40,0,0,d54688c0) at ip6_output+0xf77
mld6_sendpkt(c1ca6200,83,0,c1ca6200,d5468938) at mld6_sendpkt+0x272
mld6_start_listening(c1ca6200,2c,1,c1c49180,1c1c) at mld6_start_listening+0x78
in6_addmulti(d546896c,c1a7b000,d5468964,1,0) at in6_addmulti+0x10f
in6_update_ifa(c1a7b000,d5468a70,0,1,0) at in6_update_ifa+0x5ef
in6_ifattach_linklocal(c1a7b000,0,c19f2390,c05ce36b,c07ebfa8) at in6_ifattach_li
nklocal+0x116
in6_ifattach(c1a7b000,0,c195c400,0,0) at in6_ifattach+0xcc
in6_if_up(c1a7b000,c195c4a0) at in6_if_up+0x1b
if_route(c1a7b000,1,0,d5468b90,c09121b8) at if_route+0x67
if_up(c1a7b000,0,c0913d70,1aa,0) at if_up+0x21
bridge_on(c09157c0,1,c0913d70,1ce,d5468bc8) at bridge_on+0x88
reconfigure_bridge_locked(c1c57400,c0917620,400,252,d5468c10) at reconfigure_bri
dge_locked+0x7a
sysctl_bdg_cfg(c0915660,c0917620,400,d5468c10,d5468c10) at sysctl_bdg_cfg+0xba
sysctl_root(0,d5468c7c,4,d5468c10,c19f2320) at sysctl_root+0x154
userland_sysctl(c19f2320,d5468c7c,4,0,0) at userland_sysctl+0x12c
__sysctl(c19f2320,d5468d14,18,431,6) at __sysctl+0xaf
syscall(2f,2f,2f,0,bfbfedd0) at syscall+0x2a0
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (202, FreeBSD ELF32, __sysctl), eip = 0x280d497f, esp = 0xbfbfe53c,
ebp = 0xbfbfe568 ---